We installed a Magnum MS2812 pure sine wave inverter today to replace the Xantrex whose charger was beginning to fail. Since the Xantrex was over 13 years old and had been rebuilt once, I decided there was no point to spending more money on it. Amazon is selling the Magnum product line at incredible prices so I decided to upgrade to the 2.8 kW model (with a max output of 3.6 kW). Here's a link to the Amazon price which is more than $300 less expensive than any other price I had seen on this item:
http://www.amazon.com/Magnum-MS2812-2800W-Inverter-Charger/dp/B002MWAATK/ref=sr_1_2?ie=UTF8&qid=1368059498&sr=8-2&keywords=magnum+inverter+charger The remote control panel is another ~$200.
The installation was relatively easy other than having to crawl into the basement.
The devices are roughly the same size and both are connected to their remote panels using 4 conductor phone line so the existing connection can be reused. The Magnum does not come with a built-in subpanel so we installed a separate one above the water pump box. This has the advantage of moving the subpanel breakers to a location I can easily reach instead of having to pull things out of the basement so I can crawl in; inevitably the breaker trips early in the morning when someone does something foolish like using a hairdryer while the coffee is still brewing! Crawling into the basement before having coffee doesn't start the day out on a good note.
